User's Manual

ADSP-21369 EZ-KIT Lite Evaluation System Manual 2-5
EZ-KIT Lite Hardware Reference
To use the DAI for a different purpose, disable any signal driving the DAI
pins with a switch (see “Codec Setup Switch (SW3)” on page 2-10). In
addition, the
SW3 switch allows flexible routing of the 12.288 MHz audio
oscillator’s output signal. By default, this signal is used as the master clock
(
MCLK) for the AD1835A codec.
All of the DAI signals are available externally via the expansion interface
connectors (
J3–1), as well as the 0.1” spaced header P4. The pinout of
these connectors can be found in “Schematics” on page B-1.
DPI Interface
The pins of the digital peripheral interface (DPI) connect to a second sig-
nal routing unit (
SRU2). The SRU2 unit, similar to the SRU, is a flexible
routing system, providing a large system of signal flows within the proces-
sor. In general, the
SRU2 allows to route the DPI pins to different internal
peripherals in various combinations.
Figure 2-3. DPI Connections Block Diagram
DPI1 (MOSI)
DPI2 (MISO)
DPI3 (SPICLK)
DPI4 (SPI_AD1835CS)
DPI5 (SPI_FLASHCS)
DPI6 (LED1)
DPI7 (LED2)
DPI8 (LED3)
DPI13 (LED4)
DPI14 (LED5)
DPI9 (UART TX)
DPI10 (UART RX)
DPI12 (UART CTS)
DPI11 (UART RTS)
LED1
LED2
LED3
LED4
LED5
AD1835
SPI
FLASH
CLATCH
CCLK
COUT
CIN
CS/
SCK
SO
SI
ADSP -21369
T2IN
R2OUT
R1OUT
T1IN
T2OUT
R2IN
R1IN
T1OUT
ADM3202
DB-9
Conn